The invention discloses a method for adsorption and removal of
heavy metals and dye of waste water by garlic waste. The method provided by the invention comprises the following steps of washing a certain amount of garlic waste by water; mixing the washed garlic waste, one or more alkalis and water by stirring for 12 to 24 hours according to a
mass ratio of 1: (0.05 to 0.2): (0.5 to 2) for a reaction, filtering to obtain a
solid product, washing the
solid product by water until the
solid product has a pH value of 7, feeding the washed
solid product into a vacuum baking oven,
drying at a temperature of 60 to 120 DEG C, carrying out fragmentation and screening, collecting particles below 40 meshes, wherein the particles below 40 meshes are utilized as adsorbents, preparing a heavy
metal ion or
dye molecule aqueous solution having concentration of 0.1 to 10mmol / L, adding a certain amount of the adsorbents into the heavy
metal ion or
dye molecule aqueous solution according to a volume ratio of 0.5 to 10g / L, and shaking the
mixed solution obtained by the previous step at a
room temperature for 0.5 to 24 hours so that the adsorbents can fully adsorb heavy
metal ions or dye molecules of the heavy metal
ion or
dye molecule aqueous solution. The method provided by the invention has a reasonable design and simple processes, realizes obvious effects, greatly reduces a treatment cost, wherein the treatment cost of the method is 10 to 15% of that of the traditional treatment method, greatly shortens a
treatment period, does not produce secondary
pollution after adsorption treatment, andcan be operated and popularized easily.